Credit Card department, bad communication very unhappy

I just want a straight answer to the questions that I have asked.

Credit card department- I don't like the way I am being treated. I am a good paying client that have paid every month on time and this month they started harassing me with sms's and emails say i owe them some money ( approximately R300) while every month I pay at least R1000 if not more. I sent the request through to them... Now the problem s that i do an inter account transfer, they dont deduct. SO this is what I do every month.

The first consultant tells me ".Please note advance payment/or additional payment will not count as your next payment but will definitely reduce the balance" and continued to tell me my pay date is the 27th and would i like to change it

I dont quite agree with this or understand it but i responded asking them to change the date to the 1st of every month, acknowlege my payment I just made of R1k and tell me my balance.

The Next consultant now tells me the date of payment does not matter, They didn't receive any payment the whole november (while I actually paid on the 2nd of that month) then continuing to tell me the money I paid has reflected but has not yet cleared and I must ask the next day for an updated settlement amount

I do exactly that and They don't respond, 3 messages later and 3 days wait while in the meantime still receiving that same email and sms again telling me that I owe them.

They finally respond today telling me again they receive the payment after the due date when one of the other consutlants said the payuments don't matter.

This is what I want to know: 1. What is my balance then? 2. Why do you say I owe R300 if I pay R1000 every month but it is more than 300 why does the date then matter? 3. Why Do I seem to be getting different info from different consultants now? 4. Confirm that you received that payment and if i am still somehow in arrears then

I need this to be explained to me as There is obviously miscommunication and I am not getting any satisfaction here, this is all I am asking. Please answer my questions directly